The RPM Training Session and Comp 4.0 ropes are still some of my favorite speed ropes to do double unders on. While they’re not quite as fast as the EVO rope, they’re plenty fast enough to bang out doubles with speed and even hit triple unders (if that’s what you’re looking for). The new bearing system is an upgrade over the previous bushings, but during use it’s not all that noticeable. If you’re coming from a much earlier model RPM rope, these handles will feel like a huge upgrade, but if you’re coming from the 3.0’s, you might not see as much of a difference. Still, for the money they’re some of the best ropes and I highly recommend them.